CODEWITHSUNDEEP
javacompiler-errors
Paul U
Paul U

Reputation: 11

bad class file using javac

Some background: I'm a student just learning Java, and usually the professor handles making sure our assignments have the right class path. However, the whole semester I've been plagued by the same problem, and I still don't understand what's going wrong.

As an example, I have two files, MyProgram.java located in the folder "MyProject" and MyProgramTest.java located in the folder "ClassProject", which also contains "MyProject". MyProgramTest creates a MyProgram object and lets you test its functionality.

MyProgramTest has the line import MyProject.MyProgram; The compiling instructions my instructor gives is to use javac MyProject/*.java while in "ClassProject" which works fine. Then, we are to use javac MyProgramTest.java in the same directory. However, the compiler claims:

import MyProject.MyProgram;

bad class file: .\MyProject\MyProgram.class

class file contains wrong class: MyProgram

Please remove or make sure it appears in the correct subdirectory of the classpath.

So I don't quite understand why this is happening. MyProgram is in the MyProject directory, and that directory is in the folder I'm in. Since the instructor uses this exact method to compile these programs, I keep getting screwed since mine never compile correctly. Any idea what I'm doing wrong, or how I can fix the file to compile this way without changing the structure of the directories?

Upvotes: 1

Views: 24128

Answers (1)

anacron
anacron

Reputation: 6721

Ensure this:

The MyProgram.java file should contain this line at the top of the file:

package MyProject;

Compile MyProgram.java from the ClassProject folder:

javac -d . MyProject/*.java

Then Compile MyProgramTest.java from the same folder:

javac MyProgramTest.java

This will create the class files correctly in the appropriate folder structure.

This should solve your problem.

Hope this helps!

Upvotes: 2

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